O-ring 365x3 NBR

Large-Diameter O-Ring for Industrial Applications

H2: Reliable Static Sealing with High Oil Resistance

H2: Rubber Seal for Hydraulics and Pneumatics

Main Description

NBR O-Ring 365x3 70 ShA is a precision technical sealing ring designed for industrial applications that require reliable static sealing at large diameters. The size 365x3 indicates an inner diameter of 365 mm and a cross-section of 3 mm, making this O-ring suitable for large housings, flanges, tanks, and industrial assemblies.

Manufactured from NBR nitrile rubber, the O-ring offers high resistance to mineral oils, greases, fuels, and common industrial fluids. These properties make it a proven rubber seal for machinery, hydraulic units, pneumatic systems, and technical installations where oil exposure is expected. The hardness of 70 ShA provides an optimal balance between elasticity and mechanical strength, ensuring stable contact pressure and effective static sealing.

This O-ring is commonly used as a technical sealing solution in fixed joints, covers, and large-diameter connections, where it prevents leakage, pressure loss, and contamination. Good abrasion resistance and material stability help maintain sealing performance over long operating periods, reducing maintenance effort and system downtime.

NBR O-Ring 365x3 70 ShA is intended for B2B customers, technical wholesalers, maintenance departments, and machine manufacturers who require consistent quality, clearly defined specifications, and reliable stock availability. It supports efficient sealing in hydraulic and pneumatic sealing systems as well as general industrial equipment.

FAQ - Frequently Asked Questions

What is an NBR O-Ring 365x3 70 ShA?
It is a nitrile rubber sealing ring used mainly for static sealing in large-diameter applications.

Where are NBR 70 ShA O-rings used?
In industrial machinery, hydraulics, pneumatics, and oil-based systems.

What are the advantages of NBR material?
High resistance to oils, greases, fuels, and good mechanical durability.

Is this O-ring suitable for large housings and flanges?
Yes, the 365 mm inner diameter is designed for large industrial assemblies.

Who is this product intended for?
Industrial users, OEM manufacturers, maintenance teams, and B2B customers.